The Collaborative International Dictionary of English v.0.48:

Etymological \Et`y*mo*log"ic*al\ (-m[-o]*l[o^]j"[i^]*kal), a.
   [L. etymologicus, Gr. 'etymologiko`s: cf. F. ['e]tymologique.
   See Etymology.]
   Pertaining to etymology, or the derivation of words. --
   Et`y*mo*log"ic*al*ly, adv.
   [1913 Webster]